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Analysis of fiber fabry-Pe´rot interferometric sensors using low-coherence light sources

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3 Author(s)
Yu, B. ; Bradley Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA ; Anbo Wang ; Pickrell, G.R.

Sensitivity, fringe contrast, and dynamic range are the three most important parameters in the theoretical performance evaluation of fiber Fabry-Pe´rot (F-P) interferometric sensors. This paper theoretically models the effect that the cavity length, the F-P finesse, the source bandwidth, mirror misalignments and symmetry play in the sensitivity, fringe contrast, and dynamic range of a fiber F-P interferometer interrogated with a low-coherence light source. The developed systematic fiber F-P interferometer analysis approach and the numerical analysis results on both guided and unguided fiber F-P interferometer (FFPI) sensors may provide useful guidance for sensor design optimization.

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Lightwave Technology, Journal of  (Volume:24 ,  Issue: 4 )